Support for elevator doors and the like



Feb. 4, 1941.

1. R. DISBRO SUPPORT FOR ELEVATOR DOORS AND .THE LIKE Filed July 22,1938 INVESTOR.

// a 2?. Brow/'0 M J 4 mm m w Patented Feb. 4. 1 941 PATE T OFFICEsurroa'r ronmvs'roa nooas sun The Ira n. Diabro, Lakewood, om, designerto The W.- 8. Tyler Company, Cleveland, Ohio, a corporation of OhioApplication Jilly 22, 1938, Serial N0. 220,734

1 Claim.

This invention relates, as indicated, to supports for elevator doors andthe like, but has reference more particularly to the provision of animproved sheave for use in such supports. As is well 6 known, thelatter, more particularly in the opening and closing of an elevatordoor, are subject to rather severe impact shocks, with resulting noiseand wear.

One principal object of the invention is to provide a sheave of thecharacter described, which will relieve the shock of impact and absorbsound to a large degree, so that the door will be extremely quiet inoperation. At the same time, such sheave is of sturdy, long-livedconstruction. Another object is to design such sheave so that the partsmay be readily fabricated and assembled.

To the accomplishment of the foregoing and related ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the claim.

The annexed drawing and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of this invention may be used.

In said annexed drawing- Fig. 1 is an end elevation .showing theimproved sheave, together with the supporting hanger, door and track;Fig. 2 is a side elevation of the same; Fig. 3 is a transversecross-sectional view of the Wheel, taken on the line 3-3 of 35 Fig. 1;and Figs. 4 and, 5 are partial sectional views, similar to Fig. 3, butillustrating modifications in construction.

Referring to Figs. 1 and 2 of the drawing, there is shown a track orguide I, upon which is movably mounted a sheave, generally designated bythe reference numeral 2, the sheave being mounted for rotation about astud or shaft 3, which passes through the two parallel sides 4 and 4a ofa hanger 6. Mounted on the hanger so as to contact with the under sideof the track I, is a second plain, counter-pressure roller 5. The hanger6 is provided with a flange 'l at its lower end, to which is adjustablysecured a door 8 by means of bolts 9 and nuts iii. The door 8 may 50 beeither the door in an elevator car or a door in the elevator frame whichencloses the elevator shaft.

In the form of construction shown in Fig. 3, the peripheral portion ofthe wheel 2 consists of 55 an annular metal rim Ii, having a groove l2in its outer periphery which is formed to engage over the upper surfacell of the track i. Centrally located within such rim is a hub II whichhas preferably, formed integrally therewith. one

' element of an anti-friction bearing consisting of an inner ball racei5. Surrounding such inner ball race is an outer race it, with balls lltherebetween. The hub I may be press-fitted on the stud l, or where thelatter, as shown, takes the form of a screw, such hub will be held infixed position by drawing up such screw so as to clamp the hub betweenthe adjacent portions 4 and 4a of the hanger. The sides l8 of the hubproject beyond the inner ball race sufiiciently to leave the latter, andthe other members of the sheave, u lie clear of the hanger.

Interposed between the outer race I 8 of the bearing and the innerperiphery of the rim ii, is an annular insert of special construction,such 20 insert consisting of spaced metal rings is and 2|, with anannulus 2| of rubber or other resilient material therebetween. Theannulus II, in the construction of Fig. 3, is placed between the metalrings l9 and 20, so as always to be under 25 compression.

The modified construction illustrated in Fig. 4 is substantially thesame as the one Just described. except that the annulus 23 of rubber ishere interposed directly between the peripherally a0 grooved rim ll ofthe sheave and metal ring IS, the latter, as before, being fitted ontothe outer ball race l6. As in the previously described construction, theannular rubber layer will be preferably inserted under compressionbetween the two members just referred to.

In the further modified form illustrated in Fig. 5, the annular layer ofrubber 24, as in the construction of Fig. 4, is interposed directlybetween the peripherally grooved rim iia, which is of specialconstruction, and the inner ring "a, which is likewise of specialconstruction. As will be noted, both said rim and ball race are formedwith circumferential grooves which the rubber layer fills withcomplementary ribs or projections. In this onstruction, the rubber willdesirably, if not necessarily, be vulcanized in situ, in which case,owing to contraction following the vulcanization, the material in theannulus will be under tension rather than compression. so

It will be understood that the rubber may similarly be vulcanized insitu in each of the preceding constructions, although as stated, Iprefer to insert it under compression and to leave it in that state.

As a result 0! the foregoing construction, in each of the several formsdescribed, the sheave is practically noiseless in its operation,although moving on a metal track and subject to considerable impactshock. At the same time, such sheave is extremely sturdy and socorrespondingly long-lived in such use. Moreover, the arrangement oi theinsert between the rim and the anti-friction bearing is 01' particularadvantage, in that such insert is relieved oi stresses which would tendto separate'the rubber from the metallic parts oi such insert.

While in each of the several forms 0! my improved sheave, hereinbeioredescribed, the sounddeadening or cushioning material is referred to asvulcanized rubber, either prevulcanlzed and inserted under pressure, orvulcanized in situ, it will be understood that other equivalentnonmetallic resilient material may be employed, as for example. layersoi wound fabric which may be impregnated with a suitable binder so thatthe annulus will retain its shape and keep the parts of the sheave inproper alignment. Artiiicial rubber-like compounds and other equivalentsynthetic materials may also be used to form the insert between the rimand the outer ball race oi. the sheave.

Other modes of applying the principle of the invention may be employed,change being made as regards the details described, provided thefeatures stated in the following claim, or the equivalent of such, beemployed.

I, therefore. particularly point out and distinctly claim as myinvention:

A sheave tor supporting elevator doors and the like, said sheave adaptedfor rolling movement on a track or like support during the opening andclosing of said doors, comprising an anti-triction bearing, an annularrim formed to engage said track, and an insert interposed between saidbearing andrim, said insert consisting of spaced continuous metallicrings and an annulus of non-metallic, yielding, resilient materialbetween and held by said rings under initial compression radially ofsaid sheave.

IRA R. DISBRO.

